August 1999
Intermediate to advanced
224 pages
4h 25m
English
book
UML Distilled: A Brief Guide to the Standard Object Modeling Language, Second Edition
by Martin Fowler, Kendall Scott
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Interfaces and Abstract Classes
One of the great qualities of object-oriented development is that you can vary the interfaces of classes independent of the implementation. Much of the power of object development comes from this property. However, few people make good use of it.
Programming languages use a single construct, the class, which contains both interface and implementation. When you subclass, you inherit both. Using the interface as a separate construct is rarely used, which is a shame.
A pure interface, as in Java, is a class with no implementation and, therefore, has operation declarations but no method bodies and no fields. Interfaces are often declared through abstract classes. Such classes may provide some implementation, but often ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.